Event: Holly & the Ivy Chess League

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Opponent Rating Result
Paddy Clayton 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

400 = (0 + 400 * (1 - 0)) / 1)

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Opponent Rating Result
Andrew Batley 0 1 - 0
Brendan Briggs 92 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

46 = (92 + 400 * (1 - 1)) / 2)